Author Topic: SDS7102V noise solved  (Read 150 times)

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Offline Audiodave

  • Newbie
  • Posts: 3
  • Country: gb
SDS7102V noise solved
« on: September 16, 2020, 10:41:07 pm »
Hi, My SDS7102V is fitted with the later power pcb, I had 2 types of noise, spikes from the power supply and signal noise, the 2 should not be confused, after reading many posts here I decided to take a look, as the newer power pcb has all the extra smd ceramic caps and other mods I decided to look elsewhere, I did the D127 mod, this made a big improvement, next I used 25mm copper emi tape across the foil/ferrite to the display, insulated with pvc tape, the copper foil bonds extremely well to the chassis, I did the same across the adapter board over L2 etc, ALL the spikes have gone on both channels, the noise floor is as pictured scope is at 2mv/div pics are grounded and probe in the air, if sufficient interest I will open it back up and take pics.
 

Offline Audiodave

  • Newbie
  • Posts: 3
  • Country: gb
Re: SDS7102V noise solved
« Reply #1 on: September 16, 2020, 10:45:55 pm »
Tip grounded.
 

Offline Audiodave

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  • Posts: 3
  • Country: gb
Re: SDS7102V noise solved
« Reply #2 on: September 16, 2020, 10:48:20 pm »
The D127 mod, thanks to who devised this!
 

Offline masterx81

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  • Posts: 356
  • Country: it
Re: SDS7102V noise solved
« Reply #3 on: September 17, 2020, 06:18:23 am »
Hi! Interesting, but i've not fully understood how have you placed the emi adhesive tape.
The noise seem really good fpr this scope.
 


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